# dev.cz-agents/ares (npm · @czagents/ares)

Czech & Slovak business registry — company lookup by IČO, name, legal form, VAT. Official ARES.

- Trust score: 70/100 (medium)
- Change this week: +24
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `ares.cz-agents.dev`: 33/100, [markdown](https://verifymcp.io/servers/dev-cz-agents-ares/ares.md), [page](https://verifymcp.io/servers/dev-cz-agents-ares/ares)
- npm · `@czagents/ares`: 70/100 (this document), [markdown](https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares.md), [page](https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares)

## Channel facts

- Registry: `npm`
- Package: `@czagents/ares`
- Version: `0.1.7`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (131 of 135), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (131 of 135), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 61 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 902 tokens (~100/item across 9 items; 9 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add dev-cz-agents-ares -- npx -y @czagents/ares
```

### Codex

```bash
codex mcp add dev-cz-agents-ares -- npx -y @czagents/ares
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-cz-agents-ares": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@czagents/ares"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-cz-agents-ares --command npx --arg -y --arg @czagents/ares
```

### Hermes

```yaml
mcp_servers:
  dev-cz-agents-ares:
    command: "npx"
    args: ["-y", "@czagents/ares"]
```

### Other

```json
{
  "mcpServers": {
    "dev-cz-agents-ares": {
      "command": "npx",
      "args": [
        "-y",
        "@czagents/ares"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-02 (score 69, +48)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Stability: unverified → 0.23
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-08-01 (score 21, +16)

- [functional improvement] Tool coverage: unverified → 100

### 2026-07-31 (score 5, −23)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 28, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (9)

### `lookup_by_ico` (~102 tokens)

Get a single Czech company record by its IČO (8-digit Business ID). Returns official name, registered address, legal form, VAT ID (DIČ), founding date, and trade license activities. Returns null if IČO is not found in ARES.

Input parameters:

- `ico` (string, required): Czech IČO — 7 or 8 digits. Examples: "27074358", "61388581". Auto-validated with MOD11 checksum.

### `search_companies` (~205 tokens)

Search ARES by company name, city, street, PSČ, or NACE code. Combines all filters with AND. Useful when user knows name but not IČO, looking for companies in a building, or all businesses in a sector.

Input parameters:

- `city` (string): Filter by city (nazev obce), e.g. "Praha".
- `nace` (array): Filter by CZ-NACE activity codes, 2-6 digits. E.g., ["62"] for IT.
- `pocet` (integer): Max results (1-100, default 10).
- `psc` (integer): Filter by postal code (PSČ), 5-digit number.
- `query` (string): Partial or full company name (obchodní jméno).
- `start` (integer): Pagination offset (default 0).
- `street` (string): Filter by street name (nazev ulice), e.g. "Radlická".

### `search_by_address` (~108 tokens)

Find all companies registered at a given Czech address. Useful for due diligence (virtual offices, shell companies), real estate research, or competitor mapping in a building.

Input parameters:

- `city` (string, required): City name, e.g. "Praha".
- `pocet` (integer): Max results (default 20).
- `psc` (integer): Postal code (PSČ), optional.
- `street` (string, required): Street name (nazev ulice), e.g. "Radlická".

### `search_by_nace` (~107 tokens)

Find Czech companies by CZ-NACE activity code (economic sector classification). Example: "62" = IT, "47" = retail, "86" = healthcare. Optional city filter. Useful for market research.

Input parameters:

- `city` (string): Optional city filter.
- `nace` (string, required): CZ-NACE code, 2-6 digits (e.g., "62" for IT, "62010" for programming services).
- `pocet` (integer): Max results.

### `get_bank_accounts` (~54 tokens)

Get transparent bank accounts published for this company (only available for VAT-registered subjects). Useful to verify payment details on an invoice match the company.

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

### `get_statutaries` (~78 tokens)

Get current statutory body (jednatelé, představenstvo, etc.) of a Czech company — who can legally act on its behalf. Returns active members only (with valid zápis, not yet removed). Essential for due diligence and compliance checks.

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

### `validate_dic` (~76 tokens)

Validate a Czech DIČ (VAT ID). Format check: "CZ" + 8-10 digits. For 8-digit tail (legal entities) also runs MOD11 checksum against the embedded IČO.

Input parameters:

- `dic` (string, required): Czech DIČ — e.g., "CZ26168685". Whitespace and case tolerated.

### `check_vat_payer` (~63 tokens)

Check whether a Czech company is a registered VAT payer (plátce DPH). If yes, returns DIČ, financial office, and any transparent bank accounts (payment details).

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

### `get_history` (~47 tokens)

Get historical record of a company (previous names, registered address changes, trade license history). Useful for due diligence.

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares#diagnostics

## Score history

- 2026-08-03: 70
- 2026-08-02: 69
- 2026-08-01: 21
- 2026-07-31: 5
- 2026-07-30: 28
- 2026-07-28: 46
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/@czagents/ares
- Socket report: https://socket.dev/npm/package/@czagents/ares
- Repository: https://github.com/martinhavel/cz-agents-mcp
- Website: https://cz-agents.dev/
- Changelog RSS feed: https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares/changelog.json
- HTML version of this page: https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares